Malignancies of the ear in irradiated patients of nasopharyngeal carcinoma.
OBJECTIVE
To report on the clinical profiles and treatment experiences of patients with second primary ear malignancy after treatment of nasopharyngeal carcinoma (NPC).


METHODS
Retrospective case series.


METHODS
A retrospective review of the clinical outcomes and pathology of 11 irradiated NPC patients who subsequently had second primary malignancies of the ear at a single institution.


RESULTS
Ten tumors were squamous cell carcinoma and one tumor was chondrosarcoma occurring within the radiation field of previous treatment for NPC. The interval between previous radiotherapy and diagnosis of ear malignancy was 3 to 27 years with a median time of 17 years. Six tumors were located in the external auditory canal, two in the middle ear cavity, two in the periauricular region and one in the mastoid cavity. Four patients underwent surgery, and the other seven patients underwent surgery plus adjuvant radiotherapy. The 3-year disease-free and overall survival rates were 30.3% and 20%, respectively.


CONCLUSIONS
Postirradiated malignancy of the ear is extremely rare, but is one of the causes of death for NPC long-term survivors despite curative-intended treatment with surgery plus adjuvant radiotherapy is instituted.
Lo
Wu-Chia
WC
Department of Otolaryngology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
Ting
Lai-Lei
LL
Ko
Jenq-Yuh
JY
Lou
Pei-Jen
PJ
Yang
Tsung-Lin
TL
Chang
Yih-Leong
YL
Wang
Cheng-Ping
CP
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000209:etiology* / Q000532:radiotherapy / Q000601:surgery; D002813:Chondrosarcoma / Q000175:diagnosis / Q000209:etiology* / Q000532:radiotherapy / Q000601:surgery; D003131:Combined Modality Therapy; D018572:Disease-Free Survival; D004428:Ear Neoplasms / Q000175:diagnosis / Q000209:etiology* / Q000532:radiotherapy / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D009367:Neoplasm Staging; D009381:Neoplasms, Radiation-Induced / Q000175:diagnosis / Q000209:etiology* / Q000532:radiotherapy / Q000601:surgery; D016609:Neoplasms, Second Primary / Q000175:diagnosis / Q000209:etiology* / Q000532:radiotherapy / Q000601:surgery; D011879:Radiotherapy Dosage; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies